20560055 has 8 divisors (see below), whose sum is σ = 26123472. Its totient is φ = 15480448.

The previous prime is 20560039. The next prime is 20560061. The reversal of 20560055 is 55006502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20560055 - 2⁴ = 20560039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20560055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120857 + ... + 121026.

It is an arithmetic number, because the mean of its divisors is an integer number (3265434).

Almost surely, 2^20560055 is an apocalyptic number.

20560055 is a deficient number, since it is larger than the sum of its proper divisors (5563417).

20560055 is a wasteful number, since it uses less digits than its factorization.

20560055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241905.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 20560055 is about 4534.3196843628. The cubic root of 20560055 is about 273.9521778830.

Adding to 20560055 its sum of digits (23), we get a triangular number (20560078 = T₆₄₁₂).

Adding to 20560055 its reverse (55006502), we get a palindrome (75566557).

The spelling of 20560055 in words is "twenty million, five hundred sixty thousand, fifty-five".